It's a little crude, and it's use at you own risk, but if you're cool with that...

This really is an instance of getting what you pay for, and I wouldn't recommend using it on a big budget engine buildup. It doesn't have the development time or resources that the OEM ECUs or higher level aftermarket (AEM, Link, etc) ECUs have. But it's great for the price. I think it's really cool, and I love the concept, I just don't trust it as much as the much higher developed products. The nice thing about Hondata (even though you're just paying for software) is that you're using Honda's great hardware (designed by Kahein Technologies, or however it's spelled) so it's really bulletproof and robust. You can't really say that about Megasquirt.